Solvent backflow pressure relief device for pneumatic pump pipeline in class A tank field

Abstract

The utility model discloses a pneumatic pump pipeline solvent backflow pressure relief device for a class A tank field, which comprises a floor pipeline, a backflow control valve, a backflow pipe, a pneumatic pump and a buried storage tank, the input end of the pneumatic pump is communicated with the buried storage tank through a first conveying pipeline, and the output end of the pneumatic pump is communicated with one end of the backflow control valve. The other end of the backflow control valve is communicated with the floor pipeline through a second conveying pipeline, and the backflow pipe is communicated with the backflow control valve. According to the utility model, the backflow control valve and the backflow pipe are arranged, when the pneumatic pump stops working, the pipeline between the pneumatic pump and the floor pipeline is controlled to be closed through the backflow control valve, and the solvent flows back to the buried storage tank through the backflow pipe under the action of the excess pressure of the floor solvent pipeline, so that the excess pressure of the pipeline is released and the solvent is recycled; therefore, potential safety hazards caused by solvent leakage of floor pipelines due to long-term pressure of the pipelines are eliminated, and the service life of the pipelines is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to solvent delivery technical field especially relates to a kind of for class A tank area pneumatic pump pipeline solvent backflow pressure relief device. BACKGROUND

[0002] In the solvent delivery system of class A tank area, pneumatic pump is usually used as conveying equipment, for lifting various solvents from buried storage tank to floor pipeline for production use. However, in the actual operation process, when production is suspended and pneumatic pump stops working, the transported solvent will remain in the floor pipeline and maintain a high pressure. However, the continuous high pressure state can exacerbate the metal fatigue damage cracking of pipeline and joint, affect the service life of pipe fitting, and even cause leakage, thereby causing safety accidents, affecting production safety and environmental protection indicators. SUMMARY

[0003] The utility model is to provide a kind of for class A tank area pneumatic pump pipeline solvent backflow pressure relief device to solve one or more technical problems existing in the above background art.

[0004] To achieve this purpose, the utility model adopts the following technical solutions:

[0005] A kind of for class A tank area pneumatic pump pipeline solvent backflow pressure relief device, including floor pipeline, backflow control valve, backflow pipe, pneumatic pump and buried storage tank, the input end of the pneumatic pump is communicated with the buried storage tank by first conveying pipeline, the output end of the pneumatic pump is communicated with one end of the backflow control valve, the other end of the backflow control valve is communicated with the floor pipeline by second conveying pipeline, the backflow pipe is communicated with the backflow control valve.

[0006] Preferably, the backflow control valve is a one-way valve, the valve body of the one-way valve is communicated with one end of the backflow pipe.

[0007] Preferably, it further includes joint piece, the other end of the backflow pipe is communicated with the joint piece, and the joint piece is connected with the flange of the first conveying pipeline.

[0008] Preferably, the backflow pipe is a capillary tube.

[0009] Preferably, it further includes first stop valve and second stop valve, the first stop valve is arranged between the input end of the pneumatic pump and the first conveying pipeline, and the second stop valve is arranged between the output end of the pneumatic pump and the second conveying pipeline.

[0010] Preferably, it further includes first buffer hose and second buffer hose, the first buffer hose is arranged between the first stop valve and the joint piece, and the two ends of the second buffer hose are communicated with the output end of the pneumatic pump and one end of the one-way valve respectively.

[0011] Preferably, a filter is further included, and two ends of the filter are communicated with the joint and the first buffer hose respectively.

[0012] Preferably, the one-way valve, the return pipe, the first buffer hose, the second buffer hose and the joint are all made of stainless steel.

[0013] Preferably, an electrostatic jumper is arranged at a connecting flange between the return control valve and the second conveying pipeline and the second buffer hose, at a connecting flange between the return pipe and the return control valve and the joint, and at a connecting flange between the joint and the first conveying pipeline and the filter.

[0014] The beneficial effects of the utility model are as follows: the utility model is provided with a return control valve and a return pipe, when the pneumatic pump stops working, the pipeline between the pneumatic pump and the floor pipeline is closed through the return control valve, and the solvent is returned to the buried storage tank through the return pipe under the action of the excess pressure of the floor solvent pipeline, pipeline excess pressure release and solvent recovery are realized, thereby eliminating the safety hidden danger caused by solvent leakage of the floor pipeline due to long-term pressure of the pipeline, and prolonging the service life of the pipeline. BRIEF DESCRIPTION OF DRAWINGS

[0015] The drawings further illustrate the utility model, but the contents in the drawings do not constitute any limitation on the utility model.

[0016] Figure 1 It is the overall structure schematic view of one embodiment of the utility model.

[0017] Among them: floor pipeline 1, return control valve 2, return pipe 3, pneumatic pump 4, buried storage tank 5, first conveying pipeline 6, second conveying pipeline 7, joint 8, first stop valve 9, second stop valve 10, first buffer hose 11, second buffer hose 12, filter 13, electrostatic jumper 14. DETAILED DESCRIPTION

[0018] The technical scheme of the utility model will be further illustrated by specific embodiments in combination with the drawings.

[0019] One kind for the embodiment is a kind of for Class A tank area pneumatic pump pipeline solvent return pressure relief device, including floor pipeline 1, return control valve 2, return pipe 3, pneumatic pump 4 and buried storage tank 5, the input end of pneumatic pump 4 is communicated with buried storage tank 5 by first conveying pipeline 6, the output end of pneumatic pump 4 is communicated with one end of return control valve 2, the other end of return control valve 2 is communicated with floor pipeline 1 by second conveying pipeline 7, return pipe 3 is communicated with return control valve 2.

[0020] The backflow control valve 2 and the backflow pipe 3 are provided, when the pneumatic pump 4 stops working, the pipeline between the pneumatic pump 4 and the floor pipeline 1 is closed by the backflow control valve 2, and the solvent backflows to the buried storage tank 5 through the backflow pipe 3 under the action of the residual pressure of the floor solvent pipeline, the residual pressure release and the solvent recovery are realized, the safety hidden danger caused by the solvent leakage of the floor pipeline 1 due to the long-term pressure in the pipeline is eliminated, and the service life of the pipeline is prolonged.

[0021] Preferably, the backflow control valve 2 is a one-way valve, and the valve body of the one-way valve is in communication with one end of the backflow pipe 3. The backflow control valve 2 adopts the one-way valve, and the automatic opening and closing characteristics of the one-way valve are utilized to control the pipeline between the pneumatic pump 4 and the floor pipeline 1 to be closed without external control signals, thereby reducing the dependence on external control equipment, and reducing the complexity and cost of the system. A valve switch is arranged between the backflow control valve 2 and the backflow pipe 3, and when the backflow pipe 3 needs to be maintained, repaired or replaced, the valve switch can be closed to facilitate the operation.

[0022] Preferably, the backflow pipe 3 is in communication with the joint 8 at the other end, and the joint 8 is flange-connected with the first conveying pipeline 6. By arranging the joint 8, the other end of the backflow pipe 3 is connected to the first conveying pipeline 6, so that the solvent can backflow to the first conveying pipeline 6 through the backflow pipe 3, and finally backflow to the buried storage tank 5, thereby realizing the recovery of the solvent.

[0023] Preferably, the backflow pipe 3 is a capillary tube. Since the inner diameter of the capillary tube is much smaller than the inner diameter of the second conveying pipeline 7, the backflow pipe 3 adopts the capillary tube, and one end of the backflow pipe 3 is in communication with the valve core of the one-way valve, so that after the pneumatic pump 4 stops working, the solvent in the floor pipeline 1 will be discharged from the capillary tube under the action of the residual pressure. In actual use, in order to ensure that the solvent can backflow from the backflow pipe 3, a breather valve device can also be arranged in the buried storage tank 5.

[0024] Preferably, the first stop valve 9 and the second stop valve 10 are further arranged, the first stop valve 9 is arranged between the input end of the pneumatic pump 4 and the first conveying pipeline 6, and the second stop valve 10 is arranged between the output end of the pneumatic pump 4 and the second conveying pipeline 7. The first stop valve 9 and the second stop valve 10 are arranged to facilitate the maintenance of the pipeline and the pneumatic pump 4. The first stop valve 9 is arranged between the input end of the pneumatic pump 4 and the first conveying pipeline 6 to control the on-off of the flow direction of the solvent from the buried storage tank 5 to the pneumatic pump 4, and when the pneumatic pump 4 needs to be maintained, repaired or replaced, the first stop valve 9 can be closed to cut off the supply of the solvent, thereby ensuring the safety of the operation. The second stop valve 10 is arranged between the output end of the pneumatic pump 4 and the second conveying pipeline 7 to control the on-off of the flow direction of the solvent from the pneumatic pump 4 to the floor pipeline 1, and when maintenance, repair or cleaning is needed, the second stop valve 10 can be closed to facilitate the operation.

[0025] Preferably, the first buffer hose 11 is arranged between the first stop valve 9 and the joint 8, and the second buffer hose 12 is communicated with the output end of the pneumatic pump 4 and one end of the one-way valve respectively. By arranging the first buffer hose 11 and the second buffer hose 12, the vibration and pulse impact force at the input end and the output end of the pneumatic pump 4 can be buffered, thereby reducing the influence of the vibration and pulse impact force on the pipeline and improving the safety and reliability of the device.

[0026] Preferably, the filter 13 is communicated with the joint 8 and the first buffer hose 11 respectively. By arranging the filter 13, the solvent can be filtered by the filter 13 before entering the pneumatic pump 4, so that the impurities in the solvent are removed, the pneumatic pump 4 is prevented from being damaged by the impurities, and the flow resistance and energy loss caused by the impurities are reduced.

[0027] Preferably, the one-way valve, the return pipe 3, the first buffer hose 11, the second buffer hose 12 and the joint 8 are all made of stainless steel. The one-way valve, the return pipe 3, the first buffer hose 11, the second buffer hose 12 and the joint 8 are grounded, so that the static electricity generated by the friction between the solvent and the pipeline during the return process is eliminated.

[0028] Preferably, the static electricity jumper 14 is arranged at the connection flanges between the return control valve 2 and the second conveying pipeline 7 and the second buffer hose 12, between the return pipe 3 and the return control valve 2 and the joint 8, and between the joint 8 and the first conveying pipeline 6 and the filter 13. By arranging the static electricity jumper 14 at the flange connection positions, the pipeline and the equipment are kept connected with the ground, so that the purpose of eliminating static electricity and safe production is achieved.

[0029] The technical principles of the utility model are described above in combination with specific embodiments. These descriptions are only for explaining the principles of the utility model, and cannot be interpreted as limiting the protection scope of the utility model in any way. Based on the explanations herein, other specific embodiments of the utility model can be conceived by those skilled in the art without creative labor, and these embodiments will all fall within the protection scope of the utility model.

Claims

1. A solvent reflux and pressure relief device for pneumatic pump pipelines in Class A tank farms, characterized in that, The system comprises a floor pipe, a backflow control valve, a backflow pipe, a pneumatic pump and a buried storage tank, the input end of the pneumatic pump is communicated with the buried storage tank through a first conveying pipe, the output end of the pneumatic pump is communicated with one end of the backflow control valve, the other end of the backflow control valve is communicated with the floor pipe through a second conveying pipe, and the backflow pipe is communicated with the backflow control valve.

2. A pressure relief device for use with a pneumatic pump piping system for solvent return in a Class I tank area as defined in claim 1, wherein, The backflow control valve is a one-way valve, the valve body of the one-way valve is communicated with one end of the backflow pipe.

3. A pressure relief device for use with a pneumatic pump piping system for a Class I flammable liquid tank farm, according to claim 2, wherein: The system further comprises a joint, the other end of the backflow pipe is communicated with the joint, and the joint is flange-connected with the first conveying pipe.

4. A pressure relief device for use with a pneumatic pump piping system for solvent return in a Class I tank area as defined in claim 1, wherein, The backflow pipe is a capillary tube.

5. A pressure relief device for use with a pneumatic pump piping system for a Class I flammable liquid tank farm, according to claim 3, wherein: The system further comprises a first stop valve and a second stop valve, the first stop valve is arranged between the input end of the pneumatic pump and the first conveying pipe, and the second stop valve is arranged between the output end of the pneumatic pump and the second conveying pipe.

6. A pressure relief device for use with a pneumatic pump piping system for a Class I flammable liquid tank farm, according to claim 5, wherein: The system further comprises a first buffer hose and a second buffer hose, the first buffer hose is arranged between the first stop valve and the joint, and the two ends of the second buffer hose are respectively communicated with the output end of the pneumatic pump and one end of the one-way valve.

7. A pressure relief device for use in a vapor pump piping system for a Group I tank farm, as set forth in claim 6, wherein, The system further comprises a filter, the two ends of the filter are respectively communicated with the joint and the first buffer hose.

8. A pressure relief device for use with a pneumatic pump piping system for a Class I flammable liquid tank farm, according to claim 7, wherein: The one-way valve, the backflow pipe, the first buffer hose, the second buffer hose and the joint are all made of stainless steel.

9. A pressure relief device for use with a pneumatic pump piping system for a Class I flammable liquid tank farm, according to claim 8, wherein, Static cross-over wires are arranged at the connection flanges between the backflow control valve and the second conveying pipe and the second buffer hose, between the backflow pipe and the backflow control valve and the joint, and between the joint and the first conveying pipe and the filter.

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